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Shure GLXD14UK/SM31 Digital Wireless Headset System w/ SM31 Headset

Designed For Fitness Instruction Use


This headset-based wireless system is perfect if you're a fitness instructor, find yourself regularly delivering presentations, or speak at conferences. 

SM31FH cardioid condenser microphone

This lightweight mic delivers your voice with astounding levels of clarity. It also features some smart engineering choices, including a moisture-repellent construction which ensures optimum levels of performance, especially in humid locations. You'll also get automatic frequency management (with true digital diversity) combined with a seriously reliable wireless signal. A flexible gooseneck design means you can position the mic exactly where it's needed, while an included windscreen reduces plosives, breath and wind noise. 

GLXD1 Wireless Body Pack Transmitter 

This bit of kit will automatically link with your wireless receiver, allowing for effortless frequency switching. Not to mention a battery life providing 16 hours of continual use and an operating range of 20-30m!

GLXD4 Wireless Receiver

Smart LINKFREQ tech identifies the best current open channels; this lets the transmitter automatically swap between frequencies without interrupting your signal. Just like the body pack, you'll get 16 hours of continuous use. 



  • Weight: 60 g
  • Frequency Response: 45 Hz – 20 kHz
  • Frequency Response: Tailored
  • Sensitivity: -50.00 dBV/Pa – 3.16 mV/Pa
  • Equivalent Selfnoise: 28 dB
  • Sound Pressure: 145.0 dB
  • Transducer Type: Condenser
  • Polar Pattern: Cardioid
  • Switchable low cut: No
  • Connectors: TQG (T4AF, 4-Pin Mini)
  • Attenuator: No
  • Interchangeable Capsule: No
  • Main Functionality: Performance
  • Headphone Output: No
  • Requires Phantom Power: 5 V DC (nominal), 10 V maximum(DC bias) VDC
  • Cartridge: Fixed


  • Weight: 132 g
  • Height x Width x Depth: 90.4 × 64.5 × 22.9 mm
  • Battery life lithium: 16 h
  • Form Factor: Bodypack
  • Transmitter housings: Metal
  • Audio Mute: No
  • Detachable Antennas: No
  • Switchable RF power: No
  • Bodypack HxWxD without antenna: 90.4 x 64.5 x 22.9 g
  • Batteries: Shure Lithium-Ion battery
  • Battery Status: Multi-Colour LED
  • Charger Options: USB Charger
  • Connectors: TQG
  • Frequency Diversity: No
  • Functionality: Transmitter
  • High Density Mode: No
  • Input impedance: 900 kΩ
  • Transmission: Digital on 2.4 GHz


  • Weight: 286 g
  • Height x Width x Depth: 40.0 × 183.0 × 117.0 mm
  • Transmission: Digital on 2.4 GHz
  • Type of Power Supply: External
  • Receiver Housings: Molded ABS
  • Active Antenna Possible: No
  • Bias via BNC: No
  • Encryption: No
  • High Density Mode: No
  • Interference Detection: No
  • Remote Control: Yes
  • Number of compatible systems info: 8
  • DANTE-Enabled Products: No
  • Scan Features: Channel Scan, Group Scan
  • Detachable Antennas: No
  • Network ability: No
  • Software control : No
  • Logic: No
  • Cascade: No
  • Rack Hardware: Optional: URT2
  • Receiver Displays: Multi-function LCD
  • Receiver type: Single
  • Included antenna: External 1/2 wave
  • Battery Status: Leveled battery life indication, HH:MM (Hours and minutes)
  • Line Mic Switch: No
  • Power Requirements: 14 to 18 V DC (Tip positive with respect to ring ), 550 mA
  • RF Sensitivity: -88 dBm, for 12dB SINAD, typical
  • Phantom Power Protection: Yes
  • Antenna Input Impedance: 50 Ω
  • Tuning Range: 2400 MHz
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